Question

How does cardiac muscle contract by electrical impulse??

Answer 1

Heya ! Here is u r Ans >
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When the SA node sends an electrical impulse, it triggers the following process: The electrical signal travels from your SA node through musclecells in your right and left atria. Thesignal triggers the muscle cells that make your atria contract. The atriacontract, pumping blood into your left and right ventricles.
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